NumberResearch Membership · Data 09/20/2026

Recent prefix assignments

0 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 09/20/2026

Full prefixes (NXX) Thousands-blocks (1,000-number pools)

The Code holder is who opened each NPA-NXX prefix — not necessarily who holds the numbers. A prefix is 10,000 numbers, but under pooling its ten 1,000-number blocks are handed out individually, often to different carriers; the code holder may hold only one block, or none. The Thousands-blocks column shows how the ten blocks are really split — click which blocks → to see who holds each 1,000-number block and its last-4-digit range. Assignments are initial assignments; the current serving carrier may differ due to portability.

Most active assignees, all time — NPA 770
COMCAST IP PHONE, LLC 35
New assignments by month Sep 2026 Aug 2026 Jul 2026 Jun 2026 May 2026 Apr 2026 Mar 2026 Feb 2026 Jan 2026 Dec 2025 Nov 2025 Oct 2025
Clear Download CSV ↓
Recent NPA-NXX prefix assignments
AssignedNPA-NXXThousands-blocks taken (last-4 opening)Code holderOCNRate centerState
— 770-485 not yet reported which blocks → COMCAST IP PHONE, LLC 318J ATLANTA NW GA
— 770-557 2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → COMCAST IP PHONE, LLC 318J ATLANTA NE GA
— 770-558 0XXX5XXX7XXX8XXX9XXX · 3 holders which blocks → COMCAST IP PHONE, LLC 318J ATLANTA NE GA
— 770-559 not yet reported which blocks → COMCAST IP PHONE, LLC 318J ATLANTA NE GA
— 770-575 2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → COMCAST IP PHONE, LLC 318J ATLANTA NW GA
— 770-609 0XXX1XXX2XXX3XXX4XXX5XXX7XXX9XXX · 3 holders which blocks → COMCAST IP PHONE, LLC 318J ATLANTA NE GA
— 770-672 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → COMCAST IP PHONE, LLC 318J ATLANTA NW GA
— 770-674 3XXX6XXX8XXX9XXX · 3 holders which blocks → COMCAST IP PHONE, LLC 318J ATLANTA NE GA
— 770-675 0XXX1XXX2XXX4XXX5XXX6XXX7XXX8XXX9XXX · 2 holders which blocks → COMCAST IP PHONE, LLC 318J ATLANTA NW GA
— 770-676 1XXX2XXX3XXX4XXX5XXX6XXX8XXX · 5 holders which blocks → COMCAST IP PHONE, LLC 318J ATLANTA NE GA
— 770-679 2XXX3XXX6XXX7XXX8XXX which blocks → COMCAST IP PHONE, LLC 318J CONYERS GA
— 770-680 0XXX1XXX3XXX6XXX7XXX8XXX9XXX which blocks → COMCAST IP PHONE, LLC 318J ATLANTA NE GA
— 770-681 0–9 XXXall 10 · 2 holders which blocks → COMCAST IP PHONE, LLC 318J ATLANTA SO GA
— 770-685 0XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → COMCAST IP PHONE, LLC 318J ATLANTA NE GA
— 770-686 0XXX1XXX2XXX4XXX5XXX6XXX7XXX8XXX9XXX · 2 holders which blocks → COMCAST IP PHONE, LLC 318J ATLANTA NE GA
— 770-687 0XXX1XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX which blocks → COMCAST IP PHONE, LLC 318J ATLANTA NE GA
— 770-693 3XXX4XXX5XXX6XXX which blocks → COMCAST IP PHONE, LLC 318J ATLANTA NW GA
— 770-694 0XXX1XXX2XXX3XXX4XXX5XXX7XXX8XXX9XXX · 3 holders which blocks → COMCAST IP PHONE, LLC 318J ATLANTA NW GA
— 770-695 0–9 XXXall 10 · 5 holders which blocks → COMCAST IP PHONE, LLC 318J ATLANTA NE GA
— 770-696 0XXX3XXX6XXX7XXX8XXX · 3 holders which blocks → COMCAST IP PHONE, LLC 318J ATLANTA NE GA
— 770-703 0XXX2XXX3XXX4XXX5XXX8XXX9XXX · 2 holders which blocks → COMCAST IP PHONE, LLC 318J ATLANTA SO GA
— 770-710 0–9 XXXall 10 · 2 holders which blocks → COMCAST IP PHONE, LLC 318J ATLANTA NE GA
— 770-726 0XXX1XXX2XXX3XXX4XXX5XXX6XXX8XXX · 2 holders which blocks → COMCAST IP PHONE, LLC 318J ATLANTA NW GA
— 770-727 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 4 holders which blocks → COMCAST IP PHONE, LLC 318J SENOIA GA
— 770-728 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 6 holders which blocks → COMCAST IP PHONE, LLC 318J COVINGTON GA
— 770-731 0–9 XXXall 10 · 3 holders which blocks → COMCAST IP PHONE, LLC 318J ATLANTA SO GA
— 770-733 0XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX which blocks → COMCAST IP PHONE, LLC 318J ATLANTA NE GA
— 770-742 0–9 XXXall 10 · 4 holders which blocks → COMCAST IP PHONE, LLC 318J ATLANTA SO GA
— 770-755 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 4 holders which blocks → COMCAST IP PHONE, LLC 318J NEWNAN GA
— 770-756 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 2 holders which blocks → COMCAST IP PHONE, LLC 318J ATLANTA SO GA
— 770-783 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 3 holders which blocks → COMCAST IP PHONE, LLC 318J VILLA RICA GA
— 770-807 0–9 XXXall 10 · 5 holders which blocks → COMCAST IP PHONE, LLC 318J ATLANTA NE GA
— 770-809 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 7 holders which blocks → COMCAST IP PHONE, LLC 318J CARROLLTON GA
— 770-837 1XXX4XXX5XXX6XXX7XXX8XXX which blocks → COMCAST IP PHONE, LLC 318J ATLANTA NE GA
— 770-864 0XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 2 holders which blocks → COMCAST IP PHONE, LLC 318J ATLANTA NE GA

Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 09/20/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.